Radioactive dating stuff works

So, we have a “clock” which starts ticking the moment something dies.Obviously, this works only for things which were once living.Carbon dating is used to determine the age of biological artifacts up to 50,000 years old.This technique is widely used on recent artifacts, but educators and students alike should note that this technique will not work on older fossils (like those of the dinosaurs alleged to be millions of years old).Not only that, we top up our carbon-14 levels every time we eat.And plants top up their radioactive carbon every time they turn carbon dioxide to food during photosynthesis.

Many isotopes have been studied, probing a wide range of time scales.However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.So, we rely on radiometric dating to calculate their ages.Familiar to us as the black substance in charred wood, as diamonds, and the graphite in “lead” pencils, carbon comes in several forms, or isotopes.One rare form has atoms that are 14 times as heavy as hydrogen atoms: carbon-14, or C ratio gets smaller.

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